Question:
I am booking flights to Grenoble and I need to get to La Tania resort from the airport.
Please could you help me in where I can find such buses/trains?

Answer:
A private transfer is about €338.00 one way for one person, see the Transfer Intelligence website for more info. A taxi looks to be about 270 one way but you can have up to 4 people for that price, could have more depending if the taxi driver will negotiate. You also could pay more depending on the number of bags you have, but again you could negotiate.
There is also a transfer with Agbus. This is their schedule - http://www.agbus.fr/en/horaire_valle_tarentaise2.html. The listed cost is 113€ return and the trip looks to take 2 hours. You can book online but pay € 2.20 to do so.
Another possibility would be the bus/train combo. You would take the airport shuttle to the Grenoble train station, cost 4€ one way. From there you can take a train to Moûtiers Salins (long name Moûtiers-Salins-Brides-les-Bains. The town is Moûtiers.). The time varies depending on when you travel from 2.5 hours to over 4 hours. The cost starts at £14.00. See the Rail Europe site for more info. You can buy tickets online but it's not necessary as you can buy the day you travel and don't need a reservation.
Once you arrive in Moutiers I think you need to take a taxi (cost about €50) but there could be a shuttle bus to La Tania, but I'm not sure.
This web site has lots of info about La Tania - http://www.latania.co.uk/